The odds are pretty incredible. If you just picked all 67 games randomly, it would be one in 9.2 quintillion. (That would be a nine with 18 zeroes after it.)

The billion-dollar prize is being put up by Quicken Loans and Berkshire Hathaway. If you don't know, Berkshire Hathaway is run by Warren Buffett, who is one of the three richest people in the world with a $58.5 billion net worth.

You can start entering on March 3rd. It's only open to the first 10 million people and with that kind of payoff, I'm guessing they just might get that many signups.

If no one gets a perfect bracket, the 20 closest entries will get $100,000 each.

If you do beat the odds and make a perfect bracket, you can choose between a $500 payout or an annuity $25 million a year for 40 years.